package edu.kit.csl.pisa.models;


/*
This file is part of the PISA Alignment Tool.

Copyright (C) 2013
Karlsruhe Institute of Technology
Cognitive Systems Lab (CSL)
Felix Stahlberg

PISA is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

PISA is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with PISA. If not, see <http://www.gnu.org/licenses/>.
*/

/**
 * Null-object sentence length implementation. Models an uniform sentence 
 * length distribution (i.e. does not add a probability at all).
 */
public class UniformSentenceLengthModel implements SentenceLengthModel {

	/**
	 * Returns 0 unconditionally.
	 */
	@Override
	public double getProbability(int nSrcWords, int nTrgtWords) {
		return 0;
	}

	/**
	 * Empty method.
	 */
	@Override
	public void count(double weight, int nSrcWords, int nTrgtWords) {
		;
	}
	
	/**
	 * Empty method.
	 */
	@Override
	public void normalize() {
		;
	}

	/**
	 * Empty method.
	 */
	@Override
	public void dumpToFilesystem(String prefix, String postfix) {
		;
	}
}
